Fuel pump



' Dec; 30, 1947- G. HANTJOPOULO mm U INVENTOR.

W1 TNESSES: {:9 v

2 Sheets-Sheet 2 G. HANTJOPOULOS FUEL PUMP Filed July 27, 1944 Dec. 30, 1947,

WITNESSES:

Patented Dec. 30, 1947 UNITED STATES PATENT F FICE FUEL PUMP George Hantjopoulos, New York, N. Application July 27, 1944, Serial No. 546,873

2 Claims.

The invention relates to a fuel injecting mechanism, and more especially to a fuel pump and governor for an internal combustion engine.

The primary object of the invention is the provision of mechanism of this character, wherein the flow of fuel is automatically controlled in the feeding thereof to the respective combustion chamber of an internal combustion engine,-there being a series of pumps for injecting the fuel,

and the effective strokes of their pistons are governed and consequently the speed of the engine is regulated, and a resultant economy in fuel consumption for the successful operation of such engine.

Another object of the invention is the provision of mechanism of this character, wherein the fuel reservoir is of cylindrical formation and the cyl inders of the pumps are cast-integrally with the curved wall of the cylinder, th pump cylinders being perfectly located at the lower side of the reservoir, and such side is provided with inlet slots for each pump, while a cylindrical valve is mounted within the reservoir and is provided with an opening for the fuel inlet slots of each pump, the said mechanism being provided with means for adjusting the valve, so as to register one or more of the fuel inlet ports in each cylinder with the reservoir.

A further object of the invention is the provision of mechanism of this character, wherein any one or more of the pistons of the pumps may be held out of operation, so that it may be inactive for fuel supply, the mechanism being of novel construction, and operated in a unique manner, it being eiiective as a metering medium.

A still further object of the invention is the provision of mechanism of this character, which is simple in construction, thoroughly reliable and efficient in operation, strong, durable, automatic in the working thereof, readily and easily controlled, and inexpensive to manufacture and install.

With these and other objects in view, the invention consists in the features of construction, combination and arrangement of parts as will be hereinafter more fully described in detail, illustrated in the accompanying drawings, which show the preferred embodiment of the invention, and pointed out in the claims hereunto appended.

In the accompanying drawings- Figure 1 is an elevation of an internal combustion engine showing the mechanism constructed in accordance with the invention installed therewith.

Figure 21's -.a fragmentary end View of the-mechanism.

Figure 3 is a sectional view taken on the line 3-3 of Figure '1 looking in the direction :ofthe arrows.

Figure 4 is .a sectional view taken on the line 44 .of Figure 2 looking in the direction of the arrows.

Figure '5'is :a vertical section taken on Figure 4.

:Similar reference characters indicate corresponding parts throughout the several views :in the drawings.

Referring to the drawings in detail, A designates generally an internal combustion engine of any approved type, in this instance being of the eight cylinder design, yet 'it may be of any other form, and is illustrated to merely show the application of the fuel feed and metering mechanism denoted generally at B, as constituting .the present invention, and hereinafter described.

The mechanism B comprises 'a sectional cylinidrical fuel reservoir It, having turnable therein a hollow cylindrical plug valve l i, snugly fitting the said reservoir lo. The mechanism B is fixedly mounted on a suitable support 12, arranged horizontally exteriorly on the engine A at one side thereof, :and built at :the under side of the reservoir Ill is a laterally extended housing [3 having within a plurality of pump cylinders M, which are arranged in spaced parallel relation to each other in a plane common to one another, while this housing within has a partition [5 separating the cylinders l3 from an outer compartment l6. Within this compartment 15 is a horizontally arranged rotatable cam shaft ll carrying cam taps l8, and one end of this shaft through gearing connections I9 is associated with a rotary driven shaft 20, which through gearing 2! is operated from the crankshaft 22 of the engine A, suitable bearings 23 being provided for the said shaft 20.

The cams l8 actuate the throw plungers '24 of pumping pistons, 25, which work within the cylinders 14 for fuel pump ng operation. The plungers 26 play through fittings 2! in the partition l5, serving as guides therefor. The pistons 25 are retracted within the cylinders It by coiled expansion springs 28 seated against the latter and abutment collars 29, so that in this manner the throw plungers 24 constantly contact the cam taps IS, in the operation of the mechanism B.

The reservoir It next to the pump cylinders M has formed therein a plurality of spaced ports 39 for communication with each cylinder I4, and these ports are longitudinally aligned with the piston 25 adjacent thereto. The valve II is formed with slots 3|, each of a length equal to the number of ports 39 companion thereto, yet these slots 31 can be selectively closed by the said valve l I under hand adjustment thereof.

Leading from the respective pumping cylinders 14 are feed lines or tubings 32 which communicate with the combustion chambers of the engine A for individually feeding fuel to the respective chambers in the operation of the mechanism B. The cylinders M at the ends thereof communicating with the lines or tubings 32, each is provided with a return check valve 33 to prevent back flow of fuel therein.

The axle 34 of the valve ll exteriorly of the reservoir 19 is fitted with a hand throw lever 35 which cooperates with a rack sector 36, having thereon identifying marks or latchin keeper notches 31 so that the lever 35 can be properly set to adjust the valve H to full open position, off position, half open position and starting position, this being best seen in Figure 1 of the drawmgs.

The reservoir 19 at its uppermost portion carries an escapement cock 38, the valve H being provided with a communicating port 39 therewith. The reservoir 19 has leading thereto a fuel inlet pipe so, carried from any suitable source of supply not shown, the valve being formed with a port 4| for this pipe 49, this being best seen in Figure 5 of the drawings.

Engageable with each collar 29 is a pivotally mounted locking detent or pawl 42, which can be held disengaged therewith by a spring clip 43, and the purpose of these detents or pawls 42 is to hold a fuel pump inactive, and the detents or pawls are selectively hand controlled, as will be apparent from Figure 4 of the drawings.

The mechanism B regulates the fuel feed to the engine A and also controls the speed of operation of the latter.

From the foregoing, it is thought that the construction and manner of operation of the mechanism B will be clearly understood, and therefore, a more extended explanation has been omitted for the sake of brevity.

Changes, variations and modifications may be made in the invention as fall properly within the scope of the appended claims, without departing from the spirit of the said invention or sacrificing any of its advantages.

What is claimed is:

1. Mechanism of the kind described, comprising a sectional cylindrical fuel reservoir, a plurality of pumping cylinders formed on the lowermost portion of the reservoir at right angles thereto,'a group of adjacent ports in said fuel reservoir communicating with each pumping cylinder, a plug valve rotatably mounted in the reservoir and having slots formed in the periphery thereof and adapted to register with the respective groups of ports, each said slot being of a length'equal to the number of ports in a group and adapted to successively engage the ports of each group to control the flow of fluid through the same into each pumping cylinder, reciprocating pumping pistons within said pumping cylinders, means for rotating said plug valve for positioning the slots thereof with relation to said ports whereby, upon movement of the pistons within said pumping cylinders, a greater or lesser amount of fuel is withdrawn through sa d ports, and reciprocating means for actuating said pumping pistons in each cylinder to eject fuel therefrom.

2. The invention as in claim 1, wherein means is provided for selectively holding the reciprocating pistons in forward inoperative position to put out of operation any one or more pumping cylinders.

GEORGE HANTJOPOULOS.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name 7 Date 2,114,565 Kovach Apr. 19, 1938 2,276,895 Vosseler et al Mar. 17, 1942 2,282,562 Cole May 12, 1942 2,297,234 Meiswinkel Sept. 29, 1942 2,319,566 Sunderman et a1. May 18, 1943 

